Inverted-mantle burner.



G. T. HADLEY.

'INVERTED MANTLE BURNER. APPLICATION FILED MAR. 12. 1913'.

Patented May 19, 19%

A TTORNE Y tOLUMlIA PLANOGILAPH C0,,WASHINGTON, D.

UNITED strnrgs rn 'rnnr orrrcn.

GEORGE T. HADLEY, OF SAN FRANCISCO, CALIFORNIA.

INVERTED-MANTLE BURNER.

To all "1071 0712 it may concern Be it known that I, Gnomes T. IIADLEY, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Inverted- Mantlc Burners, of which the following is a specification.

My invention relates to the class of inverted-mantle burners.

The general object of my invention is to increase the ethciency of the burner with respect both to the luminosity and the durability of the mantle.

Particular objects and advantages will hereinafter more fully appear.

My invention consists in a burner of the inverted mantle type, said burner having a tip provided with the novel outlets, which I shall herein fully describe.

Referring to the accompanying drawings :-Figure 1 is a side. view partly in section showing my improved burner. Fig. 2 is a side elevation, enlarged, of the burnertip. Fig. is a view of a tip showing a slight modification in its outlets. Fig. 4 is a section on line L -w of Fig. 1.

1 is the usual form of burner pipe which constitutes the channel or conducting tube for the illuminating mixture or fluid. At one end of this pipe I have shown the connection 2 for attachment to the gas supply, and I have indicated at the air inlets com mon to the Bunsen injector type.

at is the burner tip. This is in general of the usual type of noncombustible material and it is fitted to the end of the channel pipe 1 by screwing, either by inside or outside threads, as the case may be. The burnertip has the usual ledges or supports upon which is hung the inverted mantle (3 in the usual manner. 7 is the shade holder and 8 is the shade or globe.

In the upper portion of the burner-tip 4 immediately above the level of the mantlesupports 5 and directly exposed to the open top of the mantle and closely proximate thereto are made the outlets 9. These, in practice, should have a maximum aggregate capacity, and for this purpose they are best made in annular series as close together as is consistent with the strength of the tip material. The outlets 9 open out from the interior of the tip to the exterior and are directly exposed to and lie close above the mantle.

Specification of Letters Patent.

Application filed March 12, 1913.

Serial No. 753,666.

In Fig. 3 I show the outlets 9 as being prolonged downward. In this form the functional portions of the outlets will still be above the mantle top, their prolongations which will extend down into the mantle being of no particular immediate service, their illustration herein being simply for the pur pose of showing that provided the upper portion of the outlets be above and clear of the top of the mantle, it is not essential that they should stop with said mantle-top. But in practice the best construction is that shown in Figs. 1 and 2.

The effect of the outlets may be considered under two main heads. First, the increase in the luminosity of the burner, and, second, the increase n the life of the mantle. Under the first head, may be stated the automatic air-regulation.

The variation of gas pressure permissible, and the quantity of air required for perfect combustion without further regulation, after once determining the maximum amount of air required for a certain quality and flow of gas, are of such latitude that it makes my burner practically automatic. If the air inlets at 3 are of sufficient amplitude to supply air necessary for perfect combustion when the gas is at its highest flow and pressure, no further regulation of the air is necessary. Any variation of the pressure of the gas, which would ordinarily cause a difference in the mixture, thereby causing poor combustion, is compensated for by the overflow or relief at the outlets 9. This is evident to such extent that with my burner, the light can be diminished until only a very small portion of the mantle may be luminous, by simply turning the gas cook of the supply pipe, resulting in perfect combustion without carbonizing the illuminating fluid or smoking up the mantle.

The second main advantage, namely the life of the mantle, may be stated to be the result of non-carbonizing, due to perfect combustion. There is no soot or smoke. These are consumed by the flames at the outlets 9. It is well known that the repeated sooting up of a mantle and its cleaning by special regulation of the illuminating mixture is destructive of the mantle, to say nothing of the loss of utility or service during the process. Thus these two advantages result in a uniform light with perfect combustion and consequent maximum candle power per mantle.

Patented May 19, 1914.

The overflow or reliet' function of the outlets 9 disposed relatively to the mantle as I have described, may Well be likened to the function of a safety valve on a boiler or other vessel under pressure. They effect and maintain an even pressure in the mantle by relieving it of any sudden pressure or excessive flow of gas. The disposition of the flames or burning tongues of gases at and from the outlets is such that any carbon in suspension, it not excessively heavy is consumed on its way out through the mantle top. The even pressure and non-carbonizing eileet of my burner thus tends to increase the candle power service per hour, and to greatly prolong the life of the mantle. My improvement is, of course, applicable to a plurality or cluster of inverted burners.

The outlets 9 in the tip are direct or straight out to the exterior and are so close to the open top of the mantle that the overflow gases coming from them are sure to be automatically ignited by the heat and flames emanating from the open top of the mantle during combustion.

I claim:

In a burner of the inverted-mantle type, a tip through Which the illuminating fluid is delivered, said tip being provided with mantle-supports and said tip having in that portion of its Walls, immediately above the level of said supports, an annular series of horizontally disposed outlets directly exposed in close proximity to the open top of the mantle carried by said supports, whereby the gases issuing from said outlets will be ig nited by the combustion of the gases in the mantle.

In testimony whereof I have signed my name to this specification in the presence 01 two subscribing Witnesses.

GEORGE T. HADLEY.

lVitnesses W'M. F. Boo'ri-r, D. B. RICHARDS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

